Compilare: main.cpp:1:47: warning: bad option '-f Ofast' to pragma 'optimize' [-Wpragmas] 1 | #pragma GCC optimize("O3, Ofast, unroll-loops") | ^ main.cpp:1:47: warning: bad option '-f unroll-loops' to pragma 'optimize' [-Wpragmas] main.cpp:5:10: warning: bad option '-f Ofast' to attribute 'optimize' [-Wattributes] 5 | int main() | ^ main.cpp:5:10: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes] main.cpp: In function 'int main()': main.cpp:38:17: warning: 'rez' may be used uninitialized [-Wmaybe-uninitialized] 38 | while(v2[rez]!=rez) | ~~~~~~^ main.cpp:9:20: note: 'rez' was declared here 9 | int n, maxx=0, rez, poz=1; | ^~~